JPH06330914A - Turnbuckle - Google Patents

Abstract

PURPOSE:To provide a turnbuckle which can perform adjustment of the length efficiently and quickly. CONSTITUTION:In a pipe 2 fitted with a coupling tool 6, a rod 3 having a coupling tool 10 is inserted in such a way as slidable. An operational cylinder 12 is installed rotationally at the end on the rod insert side of the pipe 2. A pocket 16 is formed in a part where the operational cylinder 12 of the pipe 2 is fitted, and there detent piece 17 consisting of balls is accommodated. The rod 3 is equipped at the periphery with detent recesses 18 where the detent piece 17 can be detained, at a certain spacing in the axial direction. At the bore of the operational cylinder 12, a dint is formed which mates with a pocket 16 with rotating of the operational cylinder 12. The dint is put in mating with this pocket 16 with the rotation of the operational cylinder 12, and axial direction force is given to the pipe 2 and rod 3 so that the detent piece 17 moves outward in radial direction, and the pipe 2 and rod 3 are relatively moved in the axial direction with disengagement of the detent piece 17 from the recess 18, and thereby the length of a turnbuckle is adjusted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turnbuckle used for securing a package.

[0002]

2. Description of the Related Art As the turnbuckle, a pair of screw holes are formed at both ends of a rectangular frame-shaped operation frame having a pair of side plates, and the pair of screw holes are reverse screws, and hooks or the like are provided in each screw hole. Conventionally, a threaded rod having a connector at an end thereof is screw-engaged, and a pair of threaded rods are moved in opposite directions by rotation of the operation frame.

In the above turnbuckle, the length between the connecting tools at both ends is adjusted in advance, and then each connecting tool is engaged with the engaged portion to perform the tightening work.

[0004]

By the way, in the conventional turnbuckle, since the movement amount of the screw rod per one rotation of the operation frame is small, when the length of the connecting members at both ends is greatly adjusted, the operation frame can be adjusted. Since it is necessary to rotate a large number of screws, it takes a lot of time to adjust the length, and there is a problem that the tightening work takes time.

It is a technical object of the present invention to solve the above-mentioned problems and to make it possible to adjust the lengths of the connecting members to a great extent efficiently in a short time.

[0006]

In order to solve the above-mentioned problems, according to the present invention, a telescopic shaft in which a rod is slidably inserted into a pipe and an end of the pipe on the rod insertion side are fitted. Composed of an operation cylinder rotatably supported by a rotary shaft and a rotation amount limiting means for restricting the rotation angle of the operation cylinder, and an axial screw hole is formed at one end of the expansion shaft, and the screw hole is formed in the screw hole. A connecting tool is attached to the outer end of the threaded screw rod and the other end of the telescopic shaft, and a pocket penetrating from the outer diameter surface to the inner diameter surface is formed in the portion of the pipe where the operation cylinder is fitted. An encapsulating member having a spherical surface is housed in the pocket thereof, and a hemispherical engaging concave portion capable of engaging a part of the engaging member is provided on the outer diameter surface of the rod at a predetermined interval in the axial direction, A recess is formed on the inner diameter surface of the operation cylinder to allow the engagement element to move in the outer diameter direction. Is the the recesses were adopted structure in which a rotating means for imparting a rotational force to the operating cylinder in a direction deviating the position in the circumferential direction with respect to the pocket.

[0007]

In the turnbuckle having the above structure,
When the length between the pair of connecting members is greatly adjusted, the operation tube is rotated to align the concave portion with the pocket, and then an axial force is applied to the pipe and the rod. The engagement element is pushed by the engagement recess by the application of the force, the engagement element moves in the outer diameter direction and enters the recess of the operation tube, and the engagement between the engagement element and the engagement recess is released.

Therefore, the pipe and the rod can be relatively moved in the axial direction, and the length between the pair of connecting members can be adjusted by the movement.

When the hand is removed from the operating cylinder after the length between the pair of connecting members is adjusted, the rotating force is applied to the operating cylinder in the returning direction by the action of the rotating means, and the engaging element is pressed in the inner diameter direction. Therefore, when the pipe and the rod are relatively moved in the axial direction, the engaging element moves in the inner diameter direction and engages with the engaging recess at the position where the engaging recess faces the pocket. Holds the pipe and rod in a length adjusted state.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 to 4, the telescopic shaft 1 comprises a pipe 2 and a rod 3 slidably inserted into the pipe 2.

A screw hole 4 is formed at the outer end of the pipe 2, and a screw 5a formed at one end of a screw rod 5 is screwed into the screw hole 4. Further, a hook 6 as a connecting tool is screw-engaged with a screw 5b formed at the other end of the screw rod 5.

Here, the pair of screws 5a, 5b formed at both ends of the screw rod 5 are reverse screws, and the pair of screws 5
An insertion hole 8 penetrating from one side surface to the other side surface is formed in the square shaft portion 7 provided between a and 5b.

The screw rod 5 is rotated by operating the rod inserted into the insertion hole 8. The rotation relatively moves the pipe 2 and the hook 6 in the axial direction. The screw rod 5 is fixed by tightening a lock nut 9 which is screwed to one screw 5a.

A shackle 10 as a connecting tool is attached to the outer end of the rod 3. This shackle 1
0 may be fixed to the rod 3, or, like the hook 6, may be attached so as to be movable relative to the rod 3 by a threaded rod having a reverse thread. In this case, the hook 6 may be fixed to the threaded rod 5.

A pair of rings 11a and 11b are fixed to the pipe 2 on the outer circumference of the end of the pipe 2 on the rod insertion side through means such as screwing. This pair of rings 11a,
An operation cylinder 12 is provided between 11b, and the operation cylinder 12 is rotatably supported with respect to the pipe 2.

Pins 1 shown in FIG. 4 are provided on both end faces of the operating cylinder 12.
3 is fixed, and its pin 13 is inserted into an arc-shaped long hole 14 provided on the inner end surfaces of the rings 11a and 11b. Further, a spring 15 for pressing the pin 13 in the circumferential direction is incorporated in the elongated hole 14.

The operating cylinder 12 is rotatable between a position where the pin 13 abuts on one end of the elongated hole 14 and a position where the pin 13 contracts the spring 15 to the minimum.

In the embodiment, the rotation amount limiting mechanism that regulates the rotation angle of the operating cylinder 12 and the rotating mechanism that applies a rotational force in one direction to the operating cylinder 12 are provided at the same position. You may make it provide in the position which left | separated in the circumferential direction.

A plurality of pockets 1 penetrating from the outer diameter surface to the inner diameter surface are provided in the portion of the pipe 2 into which the operation tube 12 is fitted.
6 are formed at equal intervals in the circumferential direction, and the engagement elements 17 are housed in the respective pockets 16.

Although the engagement element 17 is formed of a ball here, it may be a pin having both ends rounded in a hemispherical shape.

On the outer circumference of the rod 3, hemispherical engaging recesses 18 with which the engaging elements 17 can be engaged are formed at equal intervals in the axial direction and the circumferential direction. The circumferential spacing of the engaging recesses 18 is equal to the circumferential spacing of the pockets 16.

On the inner circumference of the operating cylinder 12, as many recesses 19 as the number of pockets 16 are formed at equal intervals in the circumferential direction.

The recess 19 has a size into which the outer end of the engaging element 17 can be inserted, and the inner surface thereof is a cam surface 20 inclined in the circumferential direction. The recess 19 rotates the operating cylinder 12 against the elasticity of the spring 15 so as to face the pocket 16 at the position where the spring 15 is most contracted by the pin 13, and the pin 13 is connected to one side of the long hole 14. In the state where it abuts against the end portion of, the position is displaced in the circumferential direction with respect to the pocket 16.

1 and 2 show a state in which the pipe 2 and the rod 3 are locked, and the engagement element 17 housed in the pocket 10 is engaged with the engagement recess 18. Further, the inner diameter surface of the operation tube 12 faces the pocket 16 and engages with the engaging element 17.
Are prevented from moving in the outer diameter direction.

In the above-mentioned state, when the length between the hook 6 and the shackle 10 is largely adjusted, the operating cylinder 12 is rotated against the elasticity of the spring 15, and as shown in FIG. In the state in which is opposed to the pocket 16, an axial force is applied to the pipe 2 and the rod 3.

By applying a force in the axial direction of the pipe 2 and the rod 3, the engaging element 17 is pushed by the engaging concave portion 18 and moves in the outer diameter direction, and the outer end portion of the engaging element 17 enters into the recess 19. Then, the engagement between the engagement element 17 and the engagement recess 18 is released, the pipe 2 and the rod 3 move relatively in the axial direction, and the length between the hook 6 and the shackle 10 is arbitrarily adjusted by the movement. be able to.

After the lengths of the hook 6 and the shackle 10 have been adjusted, when the operating force for rotating the operating tube 12 is released,
A rotational force is applied to the operation cylinder 12 by the elasticity of the spring 15, and the engagement element 17 is pressed inward by the cam surface 20.

At this time, if one of the engaging concave portions 18 formed in the rod 3 faces the pocket 16, the engaging element 1
7 engages with the engaging recess 18. When the pocket 16 and the engaging recess 18 are misaligned in the axial direction, the pipe 2 and the rod 3 are slightly moved in the axial direction so that the engaging recess 18 faces the pocket 16.

When the engaging member 17 engages with the engaging recess 18,
The operation tube 12 rotates to a position where the pin 13 comes into contact with one end of the elongated hole 14, the rotation of the operation tube 12 causes the pocket 16 and the recess 20 to be displaced in the circumferential direction, and the engagement element 17 of the operation tube 12 is displaced. The inner diameter surface prevents movement in the outer diameter direction.

Therefore, the engagement element 17 is held in a state of being engaged with the engagement concave portion 18, and the pipe 2 and the rod 3 are prevented from moving relatively in the axial direction.

In the tightening work using the turnbuckle, as described above, the dimension between the centers of the hook 6 and the shackle 10 is adjusted by the relative axial movement of the pipe 2 and the rod 3, and then the hook 6 and the shackle. 10 is engaged with the engaged portion and the screw rod 5 is rotated to perform the final tightening.

When the pipe 2 and the rod 3 are relatively moved, if the pipe 2 and the rod 3 are relatively rotated in the circumferential direction, it takes time to align the engagement recess 16 with the pocket 16, and therefore the pipe 16 It is preferable that the rod 2 and the rod 3 are relatively prevented from rotating.

As a detent, in the embodiment, as shown in FIG. 1, the groove 2 with which the engaging element 17 can be engaged in the axial direction of the rod 3.
However, it is also possible to insert a rod composed of an angular shaft into a pipe having an inner periphery of a square hole to prevent the pipe and the rod from rotating.

In the embodiment, the cam surface 20 is formed on the inner surface of the depression 19.
Although the cam surface 20 is omitted, the depression 19 may be formed in a hemispherical shape.

[0036]

As described above, in the turnbuckle according to the present invention, the pipe and the rod can be moved relative to each other in the axial direction by making the depression of the operation tube face the pocket. It is easy to greatly adjust the length between the connecting tools, and the tightening work can be performed efficiently.

Further, since the rotational force is applied to the operation tube in the direction in which the depression is displaced in the circumferential direction with respect to the pocket, the pipe and the rod are always held in the locked state, and the occurrence of slack can be reliably prevented. it can.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of a turnbuckle according to the present invention.

FIG. 2 is an enlarged cross-sectional view showing a portion of an operating cylinder of the above.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a sectional view showing an operating state of the above.

[Explanation of reference numerals] 1 expansion / contraction shaft 2 pipe 3 rod 4 screw hole 5 screw rod 6 hook 10 shackle 12 operating cylinder 13 pin 14 long hole 15 spring 16 pocket 17 engager 18 engage recess 19 recess

Claims (1)

[Claims] 1. An expansion / contraction shaft in which a rod is slidably inserted in a pipe, an operation cylinder fitted in an end portion of the pipe on the rod insertion side and rotatably supported, and a rotation angle of the operation cylinder. And a rotation amount limiting means for restricting the rotation amount. An axial screw hole is formed at one end of the expansion shaft, and the outer end of the screw rod screwed into the screw hole and the other end of the expansion shaft. Attach a connecting tool to and, form a pocket penetrating from the outer diameter surface to the inner diameter surface in the portion where the operation cylinder of the pipe is fitted, and store the engaging element having a spherical surface in the pocket, and the outer diameter of the rod. A hemispherical engagement concave portion capable of engaging a part of the engaging element is provided on the surface at a predetermined interval in the axial direction, and the engaging element is moved in the outer diameter direction on the inner diameter surface of the operating cylinder. An allowable recess is formed on the operation tube in the direction in which the recess deviates from the pocket in the circumferential direction. A turnbuckle provided with a rotating means for imparting a rotating force.